I have an 04 883c that isn't firing from one cylinder intermitently. And fires all the time @ high rpms. Ive changed plugs and wires, and checked carb. finally gave up and sent it to a shop. they have had it for 4 weeks now and do not know whats wrong. they think it may be the ecm. Any info on what else i could check seeing that i brought my bike to a shop that doesn't know anything about motorcycles. And does any one know were i can get an aftermarket ecm.